PDF malware analysis — malicious · 0d9fd890d54ebedd

MALICIOUS

PDF

7.4 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: ed1f5dbe5891a9fb4f2e529c7e04267f SHA-1: 5f1b5d62f17f39c1a1eb60b24786ef4937fe850a SHA-256: 0d9fd890d54ebeddb10896dde2ce5fc7405d6c910cf943071f7cba162b1ef18c

470 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains multiple critical heuristic firings indicating exploitation of known CVEs (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) via embedded JavaScript. The JavaScript is designed to download and execute a second-stage payload from the URLs http://state-mn.net/e/load.php?spl=pdf_new and http://state-mn.net/e/load.php?spl=pdf_pack. The presence of eval() and unescape() calls, along with shellcode download URLs, strongly suggests a dropper or downloader functionality.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 12

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Dropper.Agent-7228406-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7228406-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://state-mn.net/e/load.php?spl=pdf_new
- http://state-mn.net/e/load.php?spl=pdf_pack

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `a30eff5d06f4e759f3163d7ba827263038e5c53c9889fc21bc4847ba5073a9fe`	pdf-javascript-stream	PDF /JS object 32 at offset 0x42A	135 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `4d0f6a8991f2da1d59d3742acc4bca77db2454dcf744266e75b0da4fa6a9fdcb`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4EB	142 bytes
`javascript_obj0036_002.js` `0e54d970c629323288e20929d3b14756d1520decd7b0b627b6fb03cf4c66def8`	pdf-javascript-stream	PDF /JS object 36 at offset 0x10B	163 bytes
`javascript_obj0038_003.js` `b07d23dc5cf271185f3c314a1564b98667840d64da930336e6035e827643f885`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC5B	182 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `18c8c317c20c912d72ce885e185b4be3b0696223c280cea445dcaedb42f9ae64`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	49 bytes
`legacy_pdfkit_stage_000.js` `2740e54a7ba4c0aec57edeff1af9694a91823bc9b12bcbcb2f01c0f51d733f76`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5E5	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `2f988c583ff584a836b45f6efbacf4bc1eea11f09095a0a49dbb26dc358434a1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD99	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `4db1b8f09316651895f4f389207288a247734f1777042ad96cd8fcf366b46aac`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1406	2938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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